Improved shaking-machine for separating ores



. A. W. SCHELL. v Shaking Machine for Separating Qre.

Patented March 10, 1863.

1mm W.

UN ITED STATES PATENT OFFICE.

AUGUST WlLHE. SOHELL, OF GLAUSTLIAL, HANOVER, A SIGNOR TO GEORGE ASMUS,OF HOUGHTON, MICHIGAN.

IMPROVED SHAKING-M ACHINE FOR SEPARATHNG ORES.

Specification forming part of Letters Patent No. 37,888, dated March 10,1863.

To all whom it may concern.-

Be it known that I, AUGUST W. SOIIELL, of Glausthal, in the Kingdom ofHanover, have invented a new and Improved Self-Acting Shaking-Machine;and 1 do hereby declare that the following is a full, clear, and exactdescription of the same, reference being had to the accompanyingdrawings, forming a part of this specification, in which- Figure 1represents a transverse verticalsection of my invention, the line 00 m,Fig. 2, indicating the plane of section. Fig. 2 is a longitudinalvertical section of the same, taken in the plane indicated by the line yy in Fig. 1, and looking in the direction of the arrow opposite to thatline.

Similar letters of reference in both views indicate corresponding parts.

The object of this invention is to separate the different substancescontained in a certain ore, according to their specific gravity, simplyby the motion of the water and without any attention on the part of theoperator.

The invention consists in the arrangement of a tube extending throughthe sieve a short distance up into a cylindrical jacket, incombinationwith said sieve and with a suitable a gitator in such a manner that theheaviest particles contained in the ore, which precipitate first to thesieve, close up the access to the tube within the cylindrical jacket,and only such particles are allowed to escape through said tube thespecific gravity of which is equal to that of the first sediment.

To enable those skilled in the art to make and use my invention, I willproceed to describe it with reference to the drawings.

A represents the sieve of a shaking-machine, said sieve being secured ina horizontal position in a box, B, of wood or any other suitablematerial. This box is divided in two compartments, n m, by a verticalpartition, 0, one com partment being occupied by the sieve A and theother by a plunger, 0, to which a reciprocating rising-and-fallingmotion is imparted by means of a crank-shaft, D, the crank 61 of whichconnects by a rod, 6, with the stem f of the plunger. 1f the box B isfilled with water or other liquid, the motion of the plunger causes theliquid to pass alternately up and down through the sieve A. It isobvious, however, that motion may be imparted to the plunger by othermeans besides those above specified. The ore is introduced to the sievethrough a hopper, E, on the side of the box B, and through apertures g,and it discharges partially through a sluice, h, opposite the hopper,and partially through a tube, a, which extends up through the sieve andout through the side of the box B, as clearly shown in Fig. 2 of thedrawings. The upper end of this tube rises from oue-half to one inchabove the surface of the sieve, according to the size of the ore to betreated, and it is surrounded by a cylindrical jacket, I), which issustained by a cross-bar, i, and which extends down to within one-eighthof an inch of the sieve, or nearly so.

The operation is as follows: The grains of ore placed upon the sieve aremoved up and down as soon as the plunger commences to play in the boxfilled with water, and on precipitating said grains arrange themselvesaccording to the specific gravity, the heaviest grains below, thelightest above. Thus far an ordinary plunger shaking-machine separatesthe ore; but the grains of different specific gravity have to beseparated by hand, and the operation requires much time and great careof the operator.

By my apparatus the separation of the grains of difl'erent specificgravity is performed automatically in the following manner: At thebeginning of the work the sieve is covered with the heaviest grainscontained in the ore to a level with the top of the tube a, therebyclosing the space between the jacket I) and the sieve. If new the mixedore is admitted through the hopper, and at the same time the plungercommences to operate, the heaviest grains in the ore arrange themselvesbelow in the ordinary manner, and theymingle with the layer which hasbeen previously spread on the sieve, and which is of equal specificgravity. On account of the continuous upanddown motion this layer willbe of an uniform depth all over, an uneven accumulation of grains at anyone spot being impossible, and as soon as the depth of the layer exceedsthe height of that portion of the tube a which projects above the'sievethe heavy grains commence to discharge through said tube, the lightergrains being prevented from passing under the lower edge of the jacketI) to the mouth of said tube. The light grains are carried off throughthe sluice h, while those grains which have the desired specific gravityfind their way out through the tube a. If it is desired to againseparate that portion of the ore which discharges through the sluice h,said portion is conducted to a second shaking inachine of the sameconstruction, the sieve being covered with grains of H88 specificgravity than that in the first machine, and a second separation takesplace precisely in the same manner as above described. It is obviousthat by these means the separation can be carried on to any desiredextent with the greatest ease and facility.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

The employment or use of the tube a and cylindrical jacket b, incombination with the sieve A of a shaking-machine, construc'ed andoperating substantially as and for the purpose herein shown anddescribed.

AUG. WILHE. SCHELL.

